A simple bash script switching osx locations based on the active wifi network

switchOsxLocation.sh

#! /bin/bash

#######################################################
## Simple bash script to change OSX network location ##
## based on the wifi network you're connected too.   ##
## Author: Rob Sonke                                 ##
#######################################################

#
# NOTE: Make sure you add this line to the /etc/sudoers file to allow 
# this command without prompting for a password every time.
# yourusername ALL=(root) NOPASSWD: /usr/sbin/networksetup
#

# Constants defining the situation
HOME_WIFI='homewifiname'
WORK_WIFI='workwifiname'
HOME_LOCATION='Home'
WORK_LOCATION='Work'
WIFI_DEV='en0'

# Gather information
WIFI_NAME="$(networksetup -getairportnetwork $WIFI_DEV | sed s/'Current Wi-Fi Network: '//g)"
CURRENT_LOCATION="$(networksetup -getcurrentlocation)"

# Check and change location
if [ $HOME_WIFI = $WIFI_NAME ] && [ $CURRENT_LOCATION != $HOME_LOCATION ]
then
  # we're home, change location
  sudo networksetup -switchtolocation $HOME_LOCATION
  echo 'Home sweet home!'
elif [ $WORK_WIFI = $WIFI_NAME ] && [ $CURRENT_LOCATION != $WORK_LOCATION ]
then
  # we're at work, check if location is work too
  sudo networksetup -switchtolocation $WORK_LOCATION
  echo 'Rise and shine, a new working day has started.'
else
  # else nothing, all settings are fine or you went to a scary new location
  echo 'Nothing to do, we are all set.'
fi